BPA may refer to:
Bipolar disorder, also known as manic depression, is a mental disorder that causes periods of depression and periods of elevated mood.
BP P.L.C., also referred to by its former name, British Petroleum, is a British multinational oil and gas company headquartered in London, England.
BPA Worldwide is an American company that provides independent, third-party audits of audience claims of business-to-business and consumer magazines.
Bisphenol A (BPA) is an organic synthetic compound with the chemical formula (CH3)2C(C6H4OH)2 belonging to the group of diphenylmethane derivatives and bisphenols, with two hydroxyphenyl groups.
Collagen XVII, previously called BP180, is a transmembrane protein which plays a critical role in maintaining the linkage between the intracellular and the extracellular structural elements involved in epidermal adhesion.